I agree with JanCinVV and others’ response.
The CEO’s job is to provide vision and leadership toward that vision. The CFO’s job (and chief legal officer’s as well) is to assure that chasing the vision does not get the company in trouble. BOTH ARE ESSENTIAL.
Before I cited the problem with appointing a CFO-type to the CEO assignment. But I have also seen the consequences when a leader-type ignores the accountants and lawyers. Perhaps it might create a breakthrough in a few rare instances, but usually it ain’t pretty.